Complex networks are all around us. Think of social networks like the friends and acquaintances you have formed, biological networks where cells exchange proteins with each other in your body to communicate, or transportations networks that keep us all physically connected. In this course, you will gain insight into the basic properties of real-life networks and the implications and challenges related to them. Moreover, you will learn fundamental mathematical techniques to analyze complex networks in order to understand how real-life network properties can mathematically emerge.